Granted Patent
Utility
US 5,536,852 · App. 08/419,407
Process for the preparation of tocopherol derivatives and catalyst
Inventors:
Makoto Matsui, Hisashi Yamamoto
Patented Case
View Patent ↗
Granted: Jul 16, 1996
Filed: Apr 10, 1995
Inventors
Makoto Matsui
Hisashi Yamamoto
Assignee (at issue)
Eisai Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.